Trouble in paradise? Vishnu/FFtec N54 335ii Single Turbo kits experiencing issues as a BimmerBoost member runs 12.5@121 with misfires and having to short shift

BimmerBoost would like to thank member GeorgiaTech335Coupe for his openness and honesty regarding his Vishnu/FFTEC single turbo setup. Recently, this member took his single turbo upgraded 6-speed manual 335i to the PBIR (Palm Beach International Raceway) dragstrip in Florida to do some testing. His best run was a 12.50@121.6 alongside a 12.8@117. Yes, these times are quite a ways away from the 10.8@131 glory pass from Vishnu demonstrating the kits capability.

This is in no way the fault of GeorgiaTech335Coupe who experienced misfires on his car and had to short shift at 6300 rpm in order to avoid them. Now, Vishnu has basically portrayed this kit as perfect and ready for sale with nobody having any issues. The reason BimmerBoost is bringing this issue to the attention of the community is for potential buyers to understand what they are getting into.

There is absolutely nothing wrong with having issues when modifying a car to this level and BimmerBoost is confident Vishnu will resolve them. There is something wrong with pretending nothing is wrong. A few cars with the single turbo kits have gone up for sale and apparently a total of three people, that are willing to open their mouths, are having misfire issues with these kits.

These issues will no doubt get resolved but potential buyers and current customers needs to be aware of the process, effort, and that progress is being made. Pretending nothing is wrong and collecting money simply is the wrong way to go about this and once again (it's becoming a trend) BimmerBoost is the only site bringing these issues to the attention of the community.

For the record, a member by the name of @tmo335tt says he has a hardware solution for the misfires that he will likely share with Vishnu (hopefully not for free). Interesting that it isn't Vishnu but the community solving this.

Thanks again to @GeorgiaTech335Coupe for sharing his details, good or bad, as we all learn thanks to honesty and openness. There is more to tuning than just collecting money.

For reference, there was a stock 2013 GT500 that was trapping between 125-127.

same thing they do here at Atco

Originally Posted by dzenno@ProTUNING Freaks

Ah sucks man. This is why I always tell people to get or borrow a vbox and do some runs on closed roads to make sure their cars are running strong before hitting the strip. This way you find any issues and address them on time and then just hit the strip to optimize traction for launches and grab those slips.

This is solid advice, usually one only learns the hardway. Another viable option is to dyno the day before, kills 2 birds.. Gets you the data you need in a safe controlled environment, and a different set of numbers to compare/show

What's your plug gap? You're on 5992s right? If it moves with the coil it MIGHT not be the coil. I had misfires moving with a coil, and yah the coil was weaker than the others, but it was some software settings. Once I got a replacement coil it just moved to the next weakest coil. I got an extra coil for diagnostics now though!

What's your plug gap? You're on 5992s right? If it moves with the coil it MIGHT not be the coil. I had misfires moving with a coil, and yah the coil was weaker than the others, but it was some software settings. Once I got a replacement coil it just moved to the next weakest coil. I got an extra coil for diagnostics now though!

Gap is 23 I think. Maybe 24. Going to replace the coil since its cheap and see what happens. Im more cOncerned about the odd bank 1 fueling. Haven't seen that before.

This is solid advice, usually one only learns the hardway. Another viable option is to dyno the day before, kills 2 birds.. Gets you the data you need in a safe controlled environment, and a different set of numbers to compare/show

Yeah I was pointing out the trap speed of the gt500 so everyone could gauge the air. Only real stock car out there.

Normally I would do runs n highway to make sure everything is good, but I literally got my clutch finished being broken in last night.

Gap is 23 I think. Maybe 24. Going to replace the coil since its cheap and see what happens. Im more cOncerned about the odd bank 1 fueling. Haven't seen that before.

It probably isn't gap and likely isn't FP if its only bank 1. There are tons of threads on e90 about procede fueling discrepancies between banks. Not that that is your issue, but I'd look there. When you pull the coil, be sure to pull plugs to see if there is anything obvious like leaking injector.

All plugs were changed less than 1000 miles ago. Injector on 3 was changed in September. So I'm thinking/hoping coil. The bank 1 crap seems to be unrelated tho. Not really sure what that is. I just replaced an O2 but can't remember which one off the top of my head. No O2 codes tho.

All plugs were changed less than 1000 miles ago. Injector on 3 was changed in September. So I'm thinking/hoping coil. The bank 1 crap seems to be unrelated tho. Not really sure what that is. I just replaced an O2 but can't remember which one off the top of my head. No O2 codes tho.

I doubt it is unrelated to fueling tbh. I have seen misfires from fueling issues (too rich, too lean) many a time. Move the coil to cylinder 4-5-6 to isolate banks as well.

So far very uneventful. I haven't been able to get any traction in 1st or 2nd. Just goes straight to redline. Not 1 clean pass yet. Track prep is very bad. Best trap so far is a little over 122, but that isn't on a clean run. Also, sometimes I'm getting a misfire on cylinder 3 at redline. I think I have a bad coil. I'm still running so hopefully I can get at least 1 clean run. Otherwise that's $213 down the drain for track fee.

Any idea for the reason on cylinder 3 misfires?

Don't stress about the cash for the track, I've lost over $500 in missed events